Sealing mechanism for window frames and sashes



'lll||llll'illlull-lllllll lllLl|llllll| lllllllll Ill ATTORNEYS April10, 1928.

. H. E. CAMPBELL SEALING MECHANISM FOR WINDOW FRAMES AND SASHES FiledJune 24, 1927 Patented Apr. 10 1928. I

UNITED STATES rattan PATENT mice.

HARRY E. CAMPBELL, OF BALTIMORE, MARYLAND, ASSIGNOR 'IO CAMPBELL METALWINDOW CORPORATION, OF BALTIMORE, MARYLAND, A CORPORATION OF ,MARY-LAND.

SEALING ISM-FOR WINDOW FRAMES AND SASHES.

Application filed June 24, 1927. Serial No. 201,119.

In various of my patents, such for examle as Patent No. 1,459,711, Iillustrate a orm of window structure in which the jambs are providedwith vertical openings in their inner faces, which lead into enlargedchambers within the jambs. The sashes have plates which extend throughthe openings into the jambs and are supported by sash chains which areattached to theplates within the chambers and run over pulleys that arepositioned near the tops of-the jambs, and from the pulleys extend intothe weight chamber.

The present invention is based upon my discovery that such aconstruction will result in a very substantial leakage through thewindow unless particular provision is made to meet it. This leaka e isdue to the fact that cold air will enter t e outerchamher through thevertical opening below the upper sash, will pass upwardly around thesides of'the sash plate inthe outer chamber, thence through the pulleyholes around the sash chain into the weight chamber. From the weightchamber the air will travel through the pulley holes that lead to theinner chamber for the lower sash, and from this chamber into the roomthrough the inner vertical opening above the lower sash. The dpresentapplication contains matter derive No. 165,526, filed February 3, 1927.

The use of the enlarged chambers into which the sash plate extends isadvantageous as forming an air cushion agamstsudden increases inpressure'and as reducing the velocity of air that may tend to leakaround the sash. Accordingly, it is undesirablev to 40 fill thesechambers-to prevent the leakage referred to. I have found that it ispossible to prevent this leakage-by forming a-stop m the outer chamberwhich will limit or sub-- .stantially eliminate the passage of air uparound the outer sash to the chain holes, but which will not-materiallyinterfere with the operation of the sash or. fill up the outer chamberto eliminate the advantages that'ensue from its substantial size.

ings, in which Fig. 1 is va sectional view through a portion of a jamb;Fig. 2 is a from my earlier-applications Serial- N 696141 fil dM h 11924- d Sr' 1- 0 e are an em with a space between the bafile 6 and theVarious methods in which this can befacsectional view through a meetingrail of a window showing the face of the jamb with a part broken away,illustrating the same form of device as shown in Fig. 1. In thesefigures the device is intended to be positioned in the outer. chambernear the bottom of the upper sash; F ig'. 3 is a sectional view similarto Fig. 1 showing a modified form of construction which may be placed atany desired point in the outer chamber along the upper sash; Fig. 4 is aface View of the structure shown in Fig. 3 with a part of the coverbroken away; Fig. 5 is an alternative form of construction adapted to beused with the stop mechanism located below the upper sash but carriedbyit. The position on which this section is taken is indicated by theline 5-5 of Fig. .3, though the parts are the jamb comprises ahook-shaped member.

3 with a short leg 4 which forms a portion of the inner jamb wall and alonger leg 5 which forms apartition withinthe jamb. A bafile 6isattached to leg 5 of member 3 short leg 4, leaving a vertical openingwhich leads intov an enlarged chamber which for the; purposesof-convenience will be referred to as the outer chamber. The upper sashis provided with plates 8; which extend through such. vertical openingsinto the outer chambers. As-the parts thus far described are common toall the modifications herein illustrated, the same reference letterswillbe applied to them throughout. The

and sash are illustrated in ferredtor the patent re Referring {to ;1 and2,1 ablesubusual structureof the balance of the jambs stantially tostopthe, vertical moveme'nt of, air in the outer chamber byinsertmg. inthe outer chamber adjacent the middle .of the window, two blocks-10 and12 which will make ap roximate sliding contact with-the plate8 of p bemade of solid material but I prefer to the upper sash. These blocks may,

make them of resilient material such as felt, so that they may actuallyrub against the sides of the plate 8.

It is necessary that the form of lug illustrated in Figs. 1 and 2 beplaced near the middle of the window as no provision is made for thechain to pass through between the blocks. If it is desired to placethese blocks higher up in the jamb, an opening has to be providedthrough which the chain may pass, and means must be supplied for closingthis opening. Such a form of construction is illustrated in Figs. 3 and4 where the blocks 14 and 16 are cut out'to form a substantially roundopening 18 through which the sash chain 20 may pass. Attached to thesides of the plate 8 are two angles 21 and 22 which are adapted to pressagainst the lower faces of blocks 14 and 1.6 when the upper sash isclosed, thereby closing the opening 18.

n-Fig. 5 I show a device which is adapted to move with the upper sash.This comprises, a block 24 of such shape as substantially to fill across-sectional portion of the outer chamber and make. sliding contactwith thewalls thereof. This block should preferably be made of resilientmaterial such for example as felt. The block is attached to the plate 8,but in order to prevent the block from limiting the freedom of movementof the upper sash, the connection between the plate and the blockconsists of a pair of links 26 which are pivoted to the late by a pin28, which preferably should t loosely in the hole provided in the plate8. By this arrangement, the block 24 will move with the upper sash butthe upper sash will not be unduly restricted as to either transversemovement or movement in and out of the room.

When the means for limiting vertical movement of air in the outerchamber. are positioned near the bottom of the upper sash, there isalways the possibility that any cold air which may leak into the outerchamber between the sash plate 8 and leg 4 of member 3 will find its wayinto the room through the chain holes. Accordingly I prefer to correctthis defect by a device positioned near the top of the outer chameri asillustrated, for example, in Figs. 6, 7 an In Fi s. 6 and 7 the plate 8of the upper sash is s own as cut away at the upper corner to clear thepulley wheel 30. Positioned in the outer chamber just above the shoulderthus formed in late 8 is a block 32 provided with a conica opening 34.In the detail here shown the block 32 is also provided with a slot 35 toreceive the edge of plate 8 which extends above this block. The sashchain 20 is provided with plug 36 which fills the conical opening 34. Itis preferable that one of the members 32 or 36 be made of resilientmaterialand as here illustrated the block 32 is intendedto representfelt.

In Fig. 8 I show a modification where a metal plate 38 is substitutedfor the block 32 of Figs. 6 and 7. In this case the sash chain isprovided with a readily compressible stop 40 which may be made, forexample, of sponge rubber and slipped over the chain. When the uppersash is raised to its closed position the block 40 will press againstthe plate 38 and be squeezed against the chain 20 as well as closing upthe hole through the plate 38.

It is to be understood that the foregoing examples are given by way ofillustration only and that many other modifications may be made.

What I claim is:

1. In a window-frame and sash construction comprising jambs havingvertical openings for the upper sash leading into enlarged chamberswhich are connected to passages leading to another part of the jamb, an

upper sash with portions extending through said vertical openings intosaid chambers,

and sash suspension members attached to the upper sash in such chambersand running thence to another part of the jamb through said passages;partition members for such chambers positioned below said passages andadapted when the upper sash is closed to contact with movable sashmembers and thereby limit vertical movement of air in such chambers uparound the upper sash and into such passages.

2. In a window-frame and sash construction compkrising jambs havingvertical openings for t chambers wh1ch are connected to passages leadingto another part ofthe 'amb, an upper sash with portions exten ingthrough said vertical openings into said chambers, and sash sus ensionmembers attached to the up er sas in such chambers and running thence toanother part of the jamb throu h said passages; members movable 'with te upper sash adapted to contact with jamb members when the upper sash isclosed, substantially to fill relatively short sectional portions ofsuch chambers adjacent the upper sash and thereb limit vertical movementof air in such c ambers up around the upper sash and into such passages.

3. In a window-frame and sash construction comprising jambs havingvertical openings for the upper sash leading into enlarged chamberswhich are connected to passages leading to another part of the jamb, anupper sash with portions extendin throu said vertical openings into saicham ers, and sash suspension members attached to the upper sash in suchchambers and running thence to-anothe r part of the 'amb through saidpassages; means forlimiting vertical movement of air in such chame uppersash leading into enlarged bers consisting .of members adapted, when theupper sash is closed, substantlally to fill relatively short sectionalportions of such chambers adjacent the upper sash.

4. In a window-frame and sash construction comprising jambs havingvertical openings for the upper sash leading into enlarged chamberswhich are connected to passages leading to another part of the jamb, anupper sash with portions extending through said vertical openings intosaid chambers, and sash suspension members attached to the upper sash insuch chambers and running thence to another part of the jamb throughsaid passages; partition members for said chambers positioned below saidpassages and members movable with the upper sash adapted, when the uppersash is closed, to contact with said partition members in asubstantially horizontal plane.

5. A combination as specified in claim 4.

in which one pair ofsaid contacting members is compressible.

6. A combination as specified in'claim 4, in which the partition membersare located near the top of said chambers and the members movable withthe sash are compressible.

7. A combination as specified in claim 4, in which the members movablewith the sash are readily compressible members surround-- ing the sashchain.

8. In a window of the type having jambs, openings through the innerwalls of the jambs, a parting strip forming part of the inner jamb wallbetween such openings, sep arate enlarged chambers back of such openingsand sashes having plates adapted to extend through such openlngs, pulleywheels connected by openings with said chambers, a stop plate closingthe chambers for the upper sash near the tops thereof with holes for thepulley chain, chains attached to the contact with sash members forasmall proportion of the height of such sashes and substantially to closesaid chambers, whereby an air space is left adjacent the edge of suchsash for the greater part of its height but vertical movement of airinsuch chambers is limited.

HARRY E. CAMPBELL.

